气象2016，Vol.42Issue(4)：415-423,9.DOI:10.7519/j.issn.1000-0526.2016.04.004
强台风海鸥登陆期间近地层风特性分析
Analysis on Wind Characteristics in Surface Layer During Landfall of Typhoon Kalmaegi
摘要
Abstract
Using the multilayer wind data of the Typhoon Kalmaegi from the 90 m meteorological anemom-eter tower in Hainan Province,this paper analyzes the spatial and temporal characteristics,turbulence in-tensity,vertical wind shear and gust coefficient of the surface wind during the landing of Typhoon Kalmae-gi.The results show that the near-surface wind at different heights presents the “M”pattern during the typhoon’s landfall.The maximum wind speed appears in the rear wind circle.The wind direction rotates around by 180°before and after the typhoon sweeps the area.The near-surface wind increases along speed with the increase of height.The vertical shear of wind speed at different heights accords with logarithmic and exponential rule.Roughness,wind profile exponent,turbulence intensity and gust coefficient have negative correlations with the wind speed.They decrease with the wind speed’s increasing.The roughness characteristic is “increasing-decreasing-increasing”with the wind speed from typhoon periphery to eye. The wind speed vertical shear is strong in the typhoon eye and weak in the wind circle.The turbulence in-tensity is weak in the strong wind area and strong in the weak wind area.The turbulence intensity decreases with height in the typhoon wind circle but the situation is opposite in the typhoon eye.In gener-al,the gust coefficient increases with the hight and conforms to exponential rule in different layers.In ad-dition,the gust coefficient decreases with the wind speed until the wind speed reaches a high level.关键词
台风海鸥/近地层风/湍流强度/阵风因子/风速廓线Key words
Typhoon Kalmaegi/surface wind/turbulence intensity/gust factor/wind speed profile分类
天文与地球科学引用本文复制引用
赵小平,朱晶晶,樊晶,贵志成..强台风海鸥登陆期间近地层风特性分析[J].气象,2016,42(4):415-423,9.基金项目
海南省气象局2013年度科技创新项目（HN2013MS10）资助 （）
